Liquid Level Sensors
SST Sensing ltd manufactures and supplies a wide range of Optical Liquid Level Sensors.
The optical liquid level sensors incorporates a photo-transistor trigger which provides a digital
output that denotes the presence or absence of liquid. The mode of operation is derived from the principle of total internal reflection. An LED and photo-transistor are housed within a plastic dome at the head of the device. When no liquid is present, light from the LED is
internally reflected from the dome to the photo-transistor. When liquid covers the dome, the effective refractive index at the dome-liquid boundary changes, allowing some light from the LED to escape. Thus the amount of light received by the photo-transistor is reduced and the output switches, indicating the presence of liquid. The method of liquid level sensing is very fast, and almost instantaneous for water.
SST has the widest range of Optical Liquid Level Sensors available and we have a solution for Medical, Automotive, Industrial and Commercial Applications.
Our products start at the low cost versions from £3 to the robust industrial ones at £60. Whatever your needs are we have a sensor for your application.
Benefits
- Accurate, repeatable switching point with no moving parts
- Can be mounted in applications where space is limitedo
- Microprocessor compatible
- Easy to install, saving assembly time
- Reverse polarity, over voltage, short circuit and transient protection
Features
- Solid state technology
- Small size
- Digital (TTL) output
- Pre-wired
- Electrically robust
- Small
Function
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